G4PAIySection Class Reference

#include <G4PAIySection.hh>

Public Member Functions
	G4PAIySection ()
	~G4PAIySection ()
void	Initialize (const G4Material *material, G4double maxEnergyTransfer, G4double betaGammaSq, G4SandiaTable *)
void	ComputeLowEnergyCof (const G4Material *material)
void	InitPAI ()
void	NormShift (G4double betaGammaSq)
void	SplainPAI (G4double betaGammaSq)
G4double	RutherfordIntegral (G4int intervalNumber, G4double limitLow, G4double limitHigh)
G4double	ImPartDielectricConst (G4int intervalNumber, G4double energy)
G4double	RePartDielectricConst (G4double energy)
G4double	DifPAIySection (G4int intervalNumber, G4double betaGammaSq)
G4double	PAIdNdxCerenkov (G4int intervalNumber, G4double betaGammaSq)
G4double	PAIdNdxPlasmon (G4int intervalNumber, G4double betaGammaSq)
void	IntegralPAIySection ()
void	IntegralCerenkov ()
void	IntegralPlasmon ()
G4double	SumOverInterval (G4int intervalNumber)
G4double	SumOverIntervaldEdx (G4int intervalNumber)
G4double	SumOverInterCerenkov (G4int intervalNumber)
G4double	SumOverInterPlasmon (G4int intervalNumber)
G4double	SumOverBorder (G4int intervalNumber, G4double energy)
G4double	SumOverBorderdEdx (G4int intervalNumber, G4double energy)
G4double	SumOverBordCerenkov (G4int intervalNumber, G4double energy)
G4double	SumOverBordPlasmon (G4int intervalNumber, G4double energy)
G4double	GetStepEnergyLoss (G4double step)
G4double	GetStepCerenkovLoss (G4double step)
G4double	GetStepPlasmonLoss (G4double step)
G4int	GetNumberOfGammas () const
G4int	GetSplineSize () const
G4int	GetIntervalNumber () const
G4double	GetEnergyInterval (G4int i)
G4double	GetDifPAIySection (G4int i)
G4double	GetPAIdNdxCrenkov (G4int i)
G4double	GetPAIdNdxPlasmon (G4int i)
G4double	GetMeanEnergyLoss () const
G4double	GetMeanCerenkovLoss () const
G4double	GetMeanPlasmonLoss () const
G4double	GetNormalizationCof () const
G4double	GetPAItable (G4int i, G4int j) const
G4double	GetLorentzFactor (G4int i) const
G4double	GetSplineEnergy (G4int i) const
G4double	GetIntegralPAIySection (G4int i) const
G4double	GetIntegralPAIdEdx (G4int i) const
G4double	GetIntegralCerenkov (G4int i) const
G4double	GetIntegralPlasmon (G4int i) const
void	SetVerbose (G4int v)

Detailed Description

Definition at line 52 of file G4PAIySection.hh.

Constructor & Destructor Documentation

G4PAIySection::G4PAIySection ( )

explicit

Definition at line 76 of file G4PAIySection.cc.

{
  fSandia = 0;
  fDensity = fElectronDensity = fNormalizationCof = fLowEnergyCof = 0.0;
  fIntervalNumber = fSplineNumber = 0;
  fVerbose = 0;

  betaBohr = fine_structure_const;
  G4double cofBetaBohr = 4.0;
  G4double betaBohr2   = fine_structure_const*fine_structure_const;
  betaBohr4   = betaBohr2*betaBohr2*cofBetaBohr;
  
  fSplineEnergy          = G4DataVector(fMaxSplineSize,0.0);
  fRePartDielectricConst = G4DataVector(fMaxSplineSize,0.0);
  fImPartDielectricConst = G4DataVector(fMaxSplineSize,0.0);
  fIntegralTerm          = G4DataVector(fMaxSplineSize,0.0);
  fDifPAIySection        = G4DataVector(fMaxSplineSize,0.0);
  fdNdxCerenkov          = G4DataVector(fMaxSplineSize,0.0);
  fdNdxPlasmon           = G4DataVector(fMaxSplineSize,0.0);
  fIntegralPAIySection   = G4DataVector(fMaxSplineSize,0.0);
  fIntegralPAIdEdx       = G4DataVector(fMaxSplineSize,0.0);
  fIntegralCerenkov      = G4DataVector(fMaxSplineSize,0.0);
  fIntegralPlasmon       = G4DataVector(fMaxSplineSize,0.0);

  for( G4int i = 0; i < 500; ++i ) 
  {
    for( G4int j = 0; j < 112; ++j ) { fPAItable[i][j] = 0.0; }
  }
}

G4PAIySection::~G4PAIySection

(

)

Definition at line 110 of file G4PAIySection.cc.

{}

Member Function Documentation

void G4PAIySection::ComputeLowEnergyCof

(

const G4Material *

material

)

Definition at line 244 of file G4PAIySection.cc.

{    
  G4int i, numberOfElements = material->GetNumberOfElements();
  G4double sumZ = 0., sumCof = 0.; 

  static const G4double p0 =  1.20923e+00; 
  static const G4double p1 =  3.53256e-01; 
  static const G4double p2 = -1.45052e-03; 
  
  G4double* thisMaterialZ   = new G4double[numberOfElements];
  G4double* thisMaterialCof = new G4double[numberOfElements];
   
  for( i = 0; i < numberOfElements; i++ )
  {
    thisMaterialZ[i] = material->GetElement(i)->GetZ();
    sumZ += thisMaterialZ[i];
    thisMaterialCof[i] = p0+p1*thisMaterialZ[i]+p2*thisMaterialZ[i]*thisMaterialZ[i];   
  }
  for( i = 0; i < numberOfElements; i++ )
  {
    sumCof += thisMaterialCof[i]*thisMaterialZ[i]/sumZ;
  }
  fLowEnergyCof = sumCof;
  delete [] thisMaterialZ;
  delete [] thisMaterialCof;
  // G4cout<<"fLowEnergyCof = "<<fLowEnergyCof<<G4endl;
}

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G4double G4PAIySection::DifPAIySection	(	G4int	intervalNumber,
		G4double	betaGammaSq
	)

Definition at line 588 of file G4PAIySection.cc.

{        
  G4double beta, be2,cof,x1,x2,x3,x4,x5,x6,x7,x8,result;
   //G4double beta, be4;
   //G4double be4;
   // G4double betaBohr2 = fine_structure_const*fine_structure_const;
   // G4double betaBohr4 = betaBohr2*betaBohr2*4.0;
   be2 = betaGammaSq/(1 + betaGammaSq);
   //be4 = be2*be2;
   beta = sqrt(be2);
   cof = 1;
   x1 = log(2*electron_mass_c2/fSplineEnergy[i]);

   if( betaGammaSq < 0.01 ) x2 = log(be2);
   else
   {
     x2 = -log( (1/betaGammaSq - fRePartDielectricConst[i])*
                (1/betaGammaSq - fRePartDielectricConst[i]) + 
                fImPartDielectricConst[i]*fImPartDielectricConst[i] )/2;
   }
   if( fImPartDielectricConst[i] == 0.0 ||betaGammaSq < 0.01 )
   {
     x6=0;
   }
   else
   {
     x3 = -fRePartDielectricConst[i] + 1/betaGammaSq;
     x5 = -1 - fRePartDielectricConst[i] +
          be2*((1 +fRePartDielectricConst[i])*(1 + fRePartDielectricConst[i]) +
          fImPartDielectricConst[i]*fImPartDielectricConst[i]);

     x7 = atan2(fImPartDielectricConst[i],x3);
     x6 = x5 * x7;
   }
    // if(fImPartDielectricConst[i] == 0) x6 = 0;
   
   x4 = ((x1 + x2)*fImPartDielectricConst[i] + x6)/hbarc;
   //   if( x4 < 0.0 ) x4 = 0.0;
   x8 = (1 + fRePartDielectricConst[i])*(1 + fRePartDielectricConst[i]) + 
        fImPartDielectricConst[i]*fImPartDielectricConst[i];

   result = (x4 + cof*fIntegralTerm[i]/fSplineEnergy[i]/fSplineEnergy[i]);
   result = std::max(result, 1.0e-8);
   result *= fine_structure_const/be2/pi;
   // low energy correction

   G4double lowCof = fLowEnergyCof; // 6.0 ; // Ar ~ 4.; -> fLowCof as f(Z1,Z2)? 

   result *= (1 - exp(-beta/betaBohr/lowCof));

   //   result *= (1-exp(-beta/betaBohr))*(1-exp(-beta/betaBohr));
   //  result *= (1-exp(-be2/betaBohr2));
   // result *= (1-exp(-be4/betaBohr4));
   //   if(fDensity >= 0.1)
   if(x8 > 0.)
   { 
      result /= x8;
   }
   return result;

} // end of DifPAIySection 

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G4double G4PAIySection::GetDifPAIySection ( G4int  i )

inline

Definition at line 122 of file G4PAIySection.hh.

{ return fDifPAIySection[i]; } 

G4double G4PAIySection::GetEnergyInterval ( G4int  i )

inline

Definition at line 120 of file G4PAIySection.hh.

{ return fEnergyInterval[i]; } 

G4double G4PAIySection::GetIntegralCerenkov ( G4int  i ) const

inline

Definition at line 227 of file G4PAIySection.hh.

{
  if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralCerenkov"); }
  return fIntegralCerenkov[i];
}

G4double G4PAIySection::GetIntegralPAIdEdx ( G4int  i ) const

inline

Definition at line 221 of file G4PAIySection.hh.

{
  if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIdEdx"); }
  return fIntegralPAIdEdx[i];
}

G4double G4PAIySection::GetIntegralPAIySection ( G4int  i ) const

inline

Definition at line 215 of file G4PAIySection.hh.

{
  if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIySection"); }
  return fIntegralPAIySection[i];
}

G4double G4PAIySection::GetIntegralPlasmon ( G4int  i ) const

inline

Definition at line 233 of file G4PAIySection.hh.

{
  if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPlasmon"); }
  return fIntegralPlasmon[i];
}

G4int G4PAIySection::GetIntervalNumber ( ) const

inline

Definition at line 118 of file G4PAIySection.hh.

{ return fIntervalNumber; }

G4double G4PAIySection::GetLorentzFactor ( G4int  i ) const

inline

Definition at line 204 of file G4PAIySection.hh.

{
   return fLorentzFactor[j];
}

G4double G4PAIySection::GetMeanCerenkovLoss ( ) const

inline

Definition at line 127 of file G4PAIySection.hh.

{return fIntegralCerenkov[0]; }

G4double G4PAIySection::GetMeanEnergyLoss ( ) const

inline

Definition at line 126 of file G4PAIySection.hh.

{return fIntegralPAIySection[0]; }

G4double G4PAIySection::GetMeanPlasmonLoss ( ) const

inline

Definition at line 128 of file G4PAIySection.hh.

{return fIntegralPlasmon[0]; }

G4double G4PAIySection::GetNormalizationCof ( ) const

inline

Definition at line 130 of file G4PAIySection.hh.

{ return fNormalizationCof; }

G4int G4PAIySection::GetNumberOfGammas ( ) const

inline

Definition at line 114 of file G4PAIySection.hh.

{ return fNumberOfGammas; }

G4double G4PAIySection::GetPAIdNdxCrenkov ( G4int  i )

inline

Definition at line 123 of file G4PAIySection.hh.

{ return fdNdxCerenkov[i]; } 

G4double G4PAIySection::GetPAIdNdxPlasmon ( G4int  i )

inline

Definition at line 124 of file G4PAIySection.hh.

{ return fdNdxPlasmon[i]; } 

G4double G4PAIySection::GetPAItable ( G4int  i, G4int  j  ) const

inline

Definition at line 199 of file G4PAIySection.hh.

{
   return fPAItable[i][j];
}

G4double G4PAIySection::GetSplineEnergy ( G4int  i ) const

inline

Definition at line 209 of file G4PAIySection.hh.

{
  if(i < 1 || i > fSplineNumber) { CallError(i, "GetSplineEnergy"); }
  return fSplineEnergy[i];
}

G4int G4PAIySection::GetSplineSize ( ) const

inline

Definition at line 116 of file G4PAIySection.hh.

{ return fSplineNumber; }

G4double G4PAIySection::GetStepCerenkovLoss

(

G4double

step

)

Definition at line 1274 of file G4PAIySection.cc.

{  
  G4int iTransfer ;
  G4long numOfCollisions;
  G4double loss = 0.0;
  G4double meanNumber, position;

  // G4cout<<" G4PAIySection::GetStepCreLosnkovs "<<G4endl;



  meanNumber = fIntegralCerenkov[1]*step;
  numOfCollisions = G4Poisson(meanNumber);

  //   G4cout<<"numOfCollisions = "<<numOfCollisions<<G4endl;

  while(numOfCollisions)
  {
    position = fIntegralCerenkov[1]*G4UniformRand();

    for( iTransfer=1; iTransfer<=fSplineNumber; iTransfer++ )
    {
        if( position >= fIntegralCerenkov[iTransfer] ) break;
    }
    loss += fSplineEnergy[iTransfer] ;
    numOfCollisions--;
    // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
  }
  // G4cout<<"PAI Cerenkov loss = "<<loss/keV<<" keV"<<G4endl; 

  return loss;
}

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G4double G4PAIySection::GetStepEnergyLoss

(

G4double

step

)

Definition at line 1237 of file G4PAIySection.cc.

{  
  G4int iTransfer ;
  G4long numOfCollisions;
  G4double loss = 0.0;
  G4double meanNumber, position;

  // G4cout<<" G4PAIySection::GetStepEnergyLoss "<<G4endl;



  meanNumber = fIntegralPAIySection[1]*step;
  numOfCollisions = G4Poisson(meanNumber);

  //   G4cout<<"numOfCollisions = "<<numOfCollisions<<G4endl;

  while(numOfCollisions)
  {
    position = fIntegralPAIySection[1]*G4UniformRand();

    for( iTransfer=1; iTransfer<=fSplineNumber; iTransfer++ )
    {
        if( position >= fIntegralPAIySection[iTransfer] ) break;
    }
    loss += fSplineEnergy[iTransfer] ;
    numOfCollisions--;
    // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
  }
  // G4cout<<"PAI energy loss = "<<loss/keV<<" keV"<<G4endl; 

  return loss;
}

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G4double G4PAIySection::GetStepPlasmonLoss

(

G4double

step

)

Definition at line 1311 of file G4PAIySection.cc.

{  
  G4int iTransfer ;
  G4long numOfCollisions;
  G4double loss = 0.0;
  G4double meanNumber, position;

  // G4cout<<" G4PAIySection::GetStepCreLosnkovs "<<G4endl;



  meanNumber = fIntegralPlasmon[1]*step;
  numOfCollisions = G4Poisson(meanNumber);

  //   G4cout<<"numOfCollisions = "<<numOfCollisions<<G4endl;

  while(numOfCollisions)
  {
    position = fIntegralPlasmon[1]*G4UniformRand();

    for( iTransfer=1; iTransfer<=fSplineNumber; iTransfer++ )
    {
        if( position >= fIntegralPlasmon[iTransfer] ) break;
    }
    loss += fSplineEnergy[iTransfer] ;
    numOfCollisions--;
    // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
  }
  // G4cout<<"PAI Plasmon loss = "<<loss/keV<<" keV"<<G4endl; 

  return loss;
}

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G4double G4PAIySection::ImPartDielectricConst	(	G4int	intervalNumber,
		G4double	energy
	)

Definition at line 510 of file G4PAIySection.cc.

{
   G4double energy2,energy3,energy4,result;

   energy2 = energy1*energy1;
   energy3 = energy2*energy1;
   energy4 = energy3*energy1;
   
   result = fA1[k]/energy1+fA2[k]/energy2+fA3[k]/energy3+fA4[k]/energy4;  
   result *=hbarc/energy1;
   
   return result;

}  // end of ImPartDielectricConst 

void G4PAIySection::Initialize	(	const G4Material *	material,
		G4double	maxEnergyTransfer,
		G4double	betaGammaSq,
		G4SandiaTable *	sandia
	)

Definition at line 117 of file G4PAIySection.cc.

{
  if(fVerbose > 0)
  {
    G4cout<<G4endl;
    G4cout<<"G4PAIySection::Initialize(...,G4SandiaTable* sandia)"<<G4endl;
    G4cout<<G4endl;
  }
  G4int i, j;

  fSandia          = sandia;
  fIntervalNumber  = sandia->GetMaxInterval();
  fDensity         = material->GetDensity();
  fElectronDensity = material->GetElectronDensity();

  // fIntervalNumber--;

  if( fVerbose > 0 )
  {
    G4cout<<"fDensity = "<<fDensity<<"\t"<<fElectronDensity<<"\t fIntervalNumber = "
          <<fIntervalNumber<< " (beta*gamma)^2= " << betaGammaSq << G4endl;
  }  
  fEnergyInterval = G4DataVector(fIntervalNumber+2,0.0);
  fA1             = G4DataVector(fIntervalNumber+2,0.0);
  fA2             = G4DataVector(fIntervalNumber+2,0.0);
  fA3             = G4DataVector(fIntervalNumber+2,0.0);
  fA4             = G4DataVector(fIntervalNumber+2,0.0);

  for( i = 1; i <= fIntervalNumber; i++ ) 
  {
    if ( sandia->GetSandiaMatTablePAI(i-1,0) < 1.*eV ) 
    { 
      fIntervalNumber--;
      continue;
    }
    if( ( sandia->GetSandiaMatTablePAI(i-1,0) >= maxEnergyTransfer ) 
        || i >= fIntervalNumber ) 
    {
      fEnergyInterval[i] = maxEnergyTransfer;
      fIntervalNumber = i;
      break;
    }
    fEnergyInterval[i] = sandia->GetSandiaMatTablePAI(i-1,0);
    fA1[i]             = sandia->GetSandiaMatTablePAI(i-1,1);
    fA2[i]             = sandia->GetSandiaMatTablePAI(i-1,2);
    fA3[i]             = sandia->GetSandiaMatTablePAI(i-1,3);
    fA4[i]             = sandia->GetSandiaMatTablePAI(i-1,4);

    if( fVerbose > 0 ) {
      G4cout<<i<<"\t"<<fEnergyInterval[i]/keV<<"\t"<<fA1[i]<<"\t"<<fA2[i]<<"\t"
            <<fA3[i]<<"\t"<<fA4[i]<<"\t"<<G4endl;
    }
  }
  if( fVerbose > 0 ) { 
    G4cout<<"last i = "<<i<<"; "<<"fIntervalNumber = "
          <<fIntervalNumber<<G4endl;   
  }
  if( fEnergyInterval[fIntervalNumber] != maxEnergyTransfer )
  {
      fIntervalNumber++;
      fEnergyInterval[fIntervalNumber] = maxEnergyTransfer;
  }
  if( fVerbose > 0 )
  {  
    for( i = 1; i <= fIntervalNumber; i++ )
    {
      G4cout<<i<<"\t"<<fEnergyInterval[i]/keV<<"\t"<<fA1[i]<<"\t"<<fA2[i]<<"\t"
        <<fA3[i]<<"\t"<<fA4[i]<<"\t"<<G4endl;
    }
  }  
  if( fVerbose > 0 ) {
    G4cout<<"Now checking, if two borders are too close together"<<G4endl;
  }
  for( i = 1; i < fIntervalNumber; i++ )
  {
    if( fEnergyInterval[i+1]-fEnergyInterval[i] >
         1.5*fDelta*(fEnergyInterval[i+1]+fEnergyInterval[i]) ) continue;
    else
    {
      for( j = i; j < fIntervalNumber; j++ )
      {
              fEnergyInterval[j] = fEnergyInterval[j+1];
              fA1[j]             = fA1[j+1];
              fA2[j]             = fA2[j+1];
              fA3[j]             = fA3[j+1];
              fA4[j]             = fA4[j+1];
      }
      fIntervalNumber--;
    }
  }
  if( fVerbose > 0 )
  {
    for( i = 1; i <= fIntervalNumber; i++ )
    {
      G4cout<<i<<"\t"<<fEnergyInterval[i]/keV<<"\t"<<fA1[i]<<"\t"<<fA2[i]<<"\t"
        <<fA3[i]<<"\t"<<fA4[i]<<"\t"<<G4endl;
    }
  }
  // Preparation of fSplineEnergy array corresponding to min ionisation, G~4

  ComputeLowEnergyCof(material);
            
  G4double   betaGammaSqRef = 
    fLorentzFactor[fRefGammaNumber]*fLorentzFactor[fRefGammaNumber] - 1;

  NormShift(betaGammaSqRef);             
  SplainPAI(betaGammaSqRef);
      
  // Preparation of integral PAI cross section for input betaGammaSq
   
  for( i = 1; i <= fSplineNumber; i++ )
  {
     fDifPAIySection[i] = DifPAIySection(i,betaGammaSq);

     if( fVerbose > 0 ) G4cout<<i<<"; dNdxPAI = "<<fDifPAIySection[i]<<G4endl;
  }
  IntegralPAIySection();   
}

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void G4PAIySection::InitPAI

(

)

Definition at line 277 of file G4PAIySection.cc.

{    
   G4int i;
   G4double betaGammaSq = fLorentzFactor[fRefGammaNumber]*
                          fLorentzFactor[fRefGammaNumber] - 1;

   // Preparation of integral PAI cross section for reference gamma
   
   NormShift(betaGammaSq);             
   SplainPAI(betaGammaSq);

   IntegralPAIySection();
   IntegralCerenkov();
   IntegralPlasmon();

   for( i = 0; i<= fSplineNumber; i++)
   {
     fPAItable[i][fRefGammaNumber] = fIntegralPAIySection[i];
      
     if(i != 0)  fPAItable[i][0] = fSplineEnergy[i];     
   }
   fPAItable[0][0] = fSplineNumber;
   
   for( G4int j = 1; j < 112; j++)       // for other gammas
   {
      if( j == fRefGammaNumber ) continue;
      
      betaGammaSq = fLorentzFactor[j]*fLorentzFactor[j] - 1;
      
      for(i = 1; i <= fSplineNumber; i++)
      {
         fDifPAIySection[i] = DifPAIySection(i,betaGammaSq);
         fdNdxCerenkov[i]   = PAIdNdxCerenkov(i,betaGammaSq);
         fdNdxPlasmon[i]    = PAIdNdxPlasmon(i,betaGammaSq);
      }
      IntegralPAIySection();
      IntegralCerenkov();
      IntegralPlasmon();
      
      for(i = 0; i <= fSplineNumber; i++)
      {
        fPAItable[i][j] = fIntegralPAIySection[i];
      }
   } 
}  

void G4PAIySection::IntegralCerenkov

(

)

Definition at line 784 of file G4PAIySection.cc.

{
  G4int i, k;
   fIntegralCerenkov[fSplineNumber] = 0;
   fIntegralCerenkov[0] = 0;
   k = fIntervalNumber -1;

   for( i = fSplineNumber-1; i >= 1; i-- )
   {
      if(fSplineEnergy[i] >= fEnergyInterval[k])
      {
        fIntegralCerenkov[i] = fIntegralCerenkov[i+1] + SumOverInterCerenkov(i);
        // G4cout<<"int: i = "<<i<<"; sumC = "<<fIntegralCerenkov[i]<<G4endl;
      }
      else
      {
        fIntegralCerenkov[i] = fIntegralCerenkov[i+1] + 
                                   SumOverBordCerenkov(i+1,fEnergyInterval[k]);
        k--;
        // G4cout<<"bord: i = "<<i<<"; sumC = "<<fIntegralCerenkov[i]<<G4endl;
      }
   }

}   // end of IntegralCerenkov 

void G4PAIySection::IntegralPAIySection

(

)

Definition at line 753 of file G4PAIySection.cc.

{
  fIntegralPAIySection[fSplineNumber] = 0;
  fIntegralPAIdEdx[fSplineNumber]     = 0;
  fIntegralPAIySection[0]             = 0;
  G4int k = fIntervalNumber -1;

  for(G4int i = fSplineNumber-1; i >= 1; i--)
  {
    if(fSplineEnergy[i] >= fEnergyInterval[k])
    {
      fIntegralPAIySection[i] = fIntegralPAIySection[i+1] + SumOverInterval(i);
      fIntegralPAIdEdx[i] = fIntegralPAIdEdx[i+1] + SumOverIntervaldEdx(i);
    }
    else
    {
      fIntegralPAIySection[i] = fIntegralPAIySection[i+1] + 
                                   SumOverBorder(i+1,fEnergyInterval[k]);
      fIntegralPAIdEdx[i] = fIntegralPAIdEdx[i+1] + 
                                   SumOverBorderdEdx(i+1,fEnergyInterval[k]);
      k--;
    }
  }
}   // end of IntegralPAIySection 

void G4PAIySection::IntegralPlasmon

(

)

Definition at line 815 of file G4PAIySection.cc.

{
   fIntegralPlasmon[fSplineNumber] = 0;
   fIntegralPlasmon[0] = 0;
   G4int k = fIntervalNumber -1;
   for(G4int i=fSplineNumber-1;i>=1;i--)
   {
      if(fSplineEnergy[i] >= fEnergyInterval[k])
      {
        fIntegralPlasmon[i] = fIntegralPlasmon[i+1] + SumOverInterPlasmon(i);
      }
      else
      {
        fIntegralPlasmon[i] = fIntegralPlasmon[i+1] + 
                                   SumOverBordPlasmon(i+1,fEnergyInterval[k]);
        k--;
      }
   }

}   // end of IntegralPlasmon

void G4PAIySection::NormShift

(

G4double

betaGammaSq

)

Definition at line 328 of file G4PAIySection.cc.

{
  G4int i, j;

  for( i = 1; i <= fIntervalNumber-1; i++ )
  {
    for( j = 1; j <= 2; j++ )
    {
      fSplineNumber = (i-1)*2 + j;

      if( j == 1 ) fSplineEnergy[fSplineNumber] = fEnergyInterval[i  ]*(1+fDelta);
      else         fSplineEnergy[fSplineNumber] = fEnergyInterval[i+1]*(1-fDelta); 
      //    G4cout<<"cn = "<<fSplineNumber<<"; "<<"energy = "
      //  <<fSplineEnergy[fSplineNumber]<<G4endl;
    }
  }
  fIntegralTerm[1]=RutherfordIntegral(1,fEnergyInterval[1],fSplineEnergy[1]);

  j = 1;

  for(i=2;i<=fSplineNumber;i++)
  {
    if(fSplineEnergy[i]<fEnergyInterval[j+1])
    {
         fIntegralTerm[i] = fIntegralTerm[i-1] + 
                            RutherfordIntegral(j,fSplineEnergy[i-1],
                                                 fSplineEnergy[i]   );
    }
    else
    {
       G4double x = RutherfordIntegral(j,fSplineEnergy[i-1],
                                           fEnergyInterval[j+1]   );
         j++;
         fIntegralTerm[i] = fIntegralTerm[i-1] + x + 
                            RutherfordIntegral(j,fEnergyInterval[j],
                                                 fSplineEnergy[i]    );
    }
    // G4cout<<i<<"\t"<<fSplineEnergy[i]<<"\t"<<fIntegralTerm[i]<<"\n"<<G4endl;
  } 
  static const G4double nfactor =
    2*pi*pi*hbarc*hbarc*fine_structure_const/electron_mass_c2;
  fNormalizationCof = nfactor*fElectronDensity/fIntegralTerm[fSplineNumber];

  // G4cout<<"fNormalizationCof = "<<fNormalizationCof<<G4endl;

          // Calculation of PAI differrential cross-section (1/(keV*cm))
          // in the energy points near borders of energy intervals

   for(G4int k=1;k<=fIntervalNumber-1;k++)
   {
      for(j=1;j<=2;j++)
      {
         i = (k-1)*2 + j;
         fImPartDielectricConst[i] = fNormalizationCof*
                                     ImPartDielectricConst(k,fSplineEnergy[i]);
         fRePartDielectricConst[i] = fNormalizationCof*
                                     RePartDielectricConst(fSplineEnergy[i]);
         fIntegralTerm[i] *= fNormalizationCof;

         fDifPAIySection[i] = DifPAIySection(i,betaGammaSq);
         fdNdxCerenkov[i]   = PAIdNdxCerenkov(i,betaGammaSq);
         fdNdxPlasmon[i]    = PAIdNdxPlasmon(i,betaGammaSq);
      }
   }

}  // end of NormShift 

G4double G4PAIySection::PAIdNdxCerenkov	(	G4int	intervalNumber,
		G4double	betaGammaSq
	)

Definition at line 655 of file G4PAIySection.cc.

{        
   G4double logarithm, x3, x5, argument, modul2, dNdxC; 
   G4double be2, be4;

   //G4double cof         = 1.0;

   be2 = betaGammaSq/(1 + betaGammaSq);
   be4 = be2*be2;

   if( betaGammaSq < 0.01 ) logarithm = log(1.0+betaGammaSq); // 0.0;
   else
   {
     logarithm  = -log( (1/betaGammaSq - fRePartDielectricConst[i])*
                        (1/betaGammaSq - fRePartDielectricConst[i]) + 
                        fImPartDielectricConst[i]*fImPartDielectricConst[i] )*0.5;
     logarithm += log(1+1.0/betaGammaSq);
   }

   if( fImPartDielectricConst[i] == 0.0 || betaGammaSq < 0.01 )
   {
     argument = 0.0;
   }
   else
   {
     x3 = -fRePartDielectricConst[i] + 1.0/betaGammaSq;
     x5 = -1.0 - fRePartDielectricConst[i] +
          be2*((1.0 +fRePartDielectricConst[i])*(1.0 + fRePartDielectricConst[i]) +
          fImPartDielectricConst[i]*fImPartDielectricConst[i]);
     if( x3 == 0.0 ) argument = 0.5*pi;
     else            argument = atan2(fImPartDielectricConst[i],x3);
     argument *= x5 ;
   }   
   dNdxC = ( logarithm*fImPartDielectricConst[i] + argument )/hbarc;
  
   if(dNdxC < 1.0e-8) dNdxC = 1.0e-8;

   dNdxC *= fine_structure_const/be2/pi;

   dNdxC *= (1-exp(-be4/betaBohr4));

   //   if(fDensity >= 0.1)
   // { 
   modul2 = (1.0 + fRePartDielectricConst[i])*(1.0 + fRePartDielectricConst[i]) + 
                    fImPartDielectricConst[i]*fImPartDielectricConst[i];
   if(modul2 > 0.)
     {
       dNdxC /= modul2;
     }
   return dNdxC;

} // end of PAIdNdxCerenkov 

G4double G4PAIySection::PAIdNdxPlasmon	(	G4int	intervalNumber,
		G4double	betaGammaSq
	)

Definition at line 714 of file G4PAIySection.cc.

{        
   G4double cof, resonance, modul2, dNdxP;
   G4double be2, be4;

   cof = 1;

   be2 = betaGammaSq/(1 + betaGammaSq);
   be4 = be2*be2;
 
   resonance = log(2*electron_mass_c2*be2/fSplineEnergy[i]);  
   resonance *= fImPartDielectricConst[i]/hbarc;

   dNdxP = ( resonance + cof*fIntegralTerm[i]/fSplineEnergy[i]/fSplineEnergy[i] );

   dNdxP = std::max(dNdxP, 1.0e-8);

   dNdxP *= fine_structure_const/be2/pi;
   dNdxP *= (1-exp(-be4/betaBohr4));

//   if( fDensity >= 0.1 )
//   { 
   modul2 = (1 + fRePartDielectricConst[i])*(1 + fRePartDielectricConst[i]) + 
     fImPartDielectricConst[i]*fImPartDielectricConst[i];
   if(modul2 > 0.)
     { 
       dNdxP /= modul2;
     }
   return dNdxP;

} // end of PAIdNdxPlasmon 

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G4double G4PAIySection::RePartDielectricConst

(

G4double

energy

)

Definition at line 533 of file G4PAIySection.cc.

{       
   G4double x0, x02, x03, x04, x05, x1, x2, xx1 ,xx2 , xx12,
            c1, c2, c3, cof1, cof2, xln1, xln2, xln3, result;

   x0 = enb;
   result = 0;
   
   for(G4int i=1;i<=fIntervalNumber-1;i++)
   {
      x1 = fEnergyInterval[i];
      x2 = fEnergyInterval[i+1];
      xx1 = x1 - x0;
      xx2 = x2 - x0;
      xx12 = xx2/xx1;
      
      if(xx12<0)
      {
         xx12 = -xx12;
      }
      xln1 = log(x2/x1);
      xln2 = log(xx12);
      xln3 = log((x2 + x0)/(x1 + x0));
      x02 = x0*x0;
      x03 = x02*x0;
      x04 = x03*x0;
      x05 = x04*x0;
      G4double x12 = x1*x2;
      c1  = (x2 - x1)/x12;
      c2  = (x2 - x1)*(x2 +x1)/(x12*x12);
      c3  = (x2 -x1)*(x1*x1 + x1*x2 + x2*x2)/(x12*x12*x12);

      result -= (fA1[i]/x02 + fA3[i]/x04)*xln1;
      result -= (fA2[i]/x02 + fA4[i]/x04)*c1;
      result -= fA3[i]*c2/2/x02;
      result -= fA4[i]*c3/3/x02;

      cof1 = fA1[i]/x02 + fA3[i]/x04;
      cof2 = fA2[i]/x03 + fA4[i]/x05;

      result += 0.5*(cof1 +cof2)*xln2;
      result += 0.5*(cof1 - cof2)*xln3;
   } 
   result *= 2*hbarc/pi;
   
   return result;

}   // end of RePartDielectricConst 

G4double G4PAIySection::RutherfordIntegral	(	G4int	intervalNumber,
		G4double	limitLow,
		G4double	limitHigh
	)

Definition at line 488 of file G4PAIySection.cc.

{
   G4double  c1, c2, c3;
   // G4cout<<"RI: x1 = "<<x1<<"; "<<"x2 = "<<x2<<G4endl;
   G4double x12 = x1*x2;   
   c1 = (x2 - x1)/x12;
   c2 = (x2 - x1)*(x2 + x1)/(x12*x12);
   c3 = (x2 - x1)*(x1*x1 + x1*x2 + x2*x2)/(x12*x12*x12);
   // G4cout<<" RI: c1 = "<<c1<<"; "<<"c2 = "<<c2<<"; "<<"c3 = "<<c3<<G4endl;   
   
   return  fA1[k]*log(x2/x1) + fA2[k]*c1 + fA3[k]*c2/2 + fA4[k]*c3/3;

}   // end of RutherfordIntegral 

void G4PAIySection::SetVerbose ( G4int  v )

inline

Definition at line 143 of file G4PAIySection.hh.

{ fVerbose = v; };

void G4PAIySection::SplainPAI

(

G4double

betaGammaSq

)

Definition at line 401 of file G4PAIySection.cc.

{
   G4int k = 1;
   G4int i = 1;

   while ( (i < fSplineNumber) && (fSplineNumber < fMaxSplineSize-1) )
   {
      if(fSplineEnergy[i+1] > fEnergyInterval[k+1])
      {
          k++;   // Here next energy point is in next energy interval
          i++;
          continue;
      }
                        // Shifting of arrayes for inserting the geometrical 
                       // average of 'i' and 'i+1' energy points to 'i+1' place
      fSplineNumber++;

      for(G4int j = fSplineNumber; j >= i+2; j-- )
      {
         fSplineEnergy[j]          = fSplineEnergy[j-1];
         fImPartDielectricConst[j] = fImPartDielectricConst[j-1];
         fRePartDielectricConst[j] = fRePartDielectricConst[j-1];
         fIntegralTerm[j]          = fIntegralTerm[j-1];

         fDifPAIySection[j] = fDifPAIySection[j-1];
         fdNdxCerenkov[j]   = fdNdxCerenkov[j-1];
         fdNdxPlasmon[j]    = fdNdxPlasmon[j-1];
      }
      G4double x1  = fSplineEnergy[i];
      G4double x2  = fSplineEnergy[i+1];
      G4double yy1 = fDifPAIySection[i];
      G4double y2  = fDifPAIySection[i+1];

      G4double en1 = sqrt(x1*x2);
      fSplineEnergy[i+1] = en1;

                 // Calculation of logarithmic linear approximation
                 // in this (enr) energy point, which number is 'i+1' now

      G4double a = log10(y2/yy1)/log10(x2/x1);
      G4double b = log10(yy1) - a*log10(x1);
      G4double y = a*log10(en1) + b;
      y = pow(10.,y);

                 // Calculation of the PAI dif. cross-section at this point

      fImPartDielectricConst[i+1] = fNormalizationCof*
                                    ImPartDielectricConst(k,fSplineEnergy[i+1]);
      fRePartDielectricConst[i+1] = fNormalizationCof*
                                    RePartDielectricConst(fSplineEnergy[i+1]);
      fIntegralTerm[i+1] = fIntegralTerm[i] + fNormalizationCof*
                           RutherfordIntegral(k,fSplineEnergy[i],
                                                fSplineEnergy[i+1]);

      fDifPAIySection[i+1] = DifPAIySection(i+1,betaGammaSq);
      fdNdxCerenkov[i+1]   = PAIdNdxCerenkov(i+1,betaGammaSq);
      fdNdxPlasmon[i+1]    = PAIdNdxPlasmon(i+1,betaGammaSq);

                  // Condition for next division of this segment or to pass
                  // to higher energies

      G4double x = 2*(fDifPAIySection[i+1] - y)/(fDifPAIySection[i+1] + y);

      G4double delta = 2.*(fSplineEnergy[i+1]-fSplineEnergy[i])
    /(fSplineEnergy[i+1]+fSplineEnergy[i]);

      if( x < 0 ) 
      {
         x = -x;
      }
      if( x > fError && fSplineNumber < fMaxSplineSize-1 && delta > 2.*fDelta  )
      {
         continue;  // next division
      }
      i += 2;  // pass to next segment

      // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
   }   // close 'while'

}  // end of SplainPAI 

G4double G4PAIySection::SumOverBordCerenkov	(	G4int	intervalNumber,
		G4double	energy
	)

Definition at line 1115 of file G4PAIySection.cc.

{               
   G4double x0,x1,y0,yy1,a,e0,c,d,result;

   e0 = en0;
   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];
   y0 = fdNdxCerenkov[i];
   yy1 = fdNdxCerenkov[i+1];

   //  G4cout<<G4endl;
   //G4cout<<"SumBordC, i = "<<i<<"; en0 = "<<en0<<"; x0 ="<<x0<<"; x1 = "<<x1
   //     <<"; y0 = "<<y0<<"; yy1 = "<<yy1<<G4endl;
   c = x1/x0;
   d = e0/x0;
   a = log10(yy1/y0)/log10(c);
 
   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);
   
   a += 1.0;
   if( a == 0 ) result = b*log(x0/e0);
   else         result = y0*(x0 - e0*pow(d,a-1))/a;   
   a += 1.0;

   if( a == 0 ) fIntegralCerenkov[0] += b*log(x0/e0);
   else         fIntegralCerenkov[0] += y0*(x0*x0 - e0*e0*pow(d,a-2))/a;

   //G4cout<<"a = "<<a<<"; b = "<<b<<"; result = "<<result<<G4endl;
   
   x0  = fSplineEnergy[i - 1];
   x1  = fSplineEnergy[i - 2];
   y0  = fdNdxCerenkov[i - 1];
   yy1 = fdNdxCerenkov[i - 2];

   //G4cout<<"x0 ="<<x0<<"; x1 = "<<x1
   //    <<"; y0 = "<<y0<<"; yy1 = "<<yy1<<G4endl;

   c = x1/x0;
   d = e0/x0;
   a  = log10(yy1/y0)/log10(x1/x0);
  
   //   G4cout << "a= " << a << G4endl;
   if(a > 20.0) b = 0.0;
   else         b = y0/pow(x0,a); 

   //G4cout << "b= " << b << G4endl;

   a += 1.0;
   if( a == 0 ) result += b*log(e0/x0);
   else         result += y0*(e0*pow(d,a-1) - x0 )/a;
   a += 1.0;
   //G4cout << "result= " << result << G4endl;

   if( a == 0 )   fIntegralCerenkov[0] += b*log(e0/x0);
   else           fIntegralCerenkov[0] += y0*(e0*e0*pow(d,a-2) - x0*x0)/a;

   //G4cout<<"a = "<<a<<"; b = "<<b<<"; result = "<<result<<G4endl;    

   return result;

} 

G4double G4PAIySection::SumOverBorder	(	G4int	intervalNumber,
		G4double	energy
	)

Definition at line 989 of file G4PAIySection.cc.

{               
  G4double x0,x1,y0,yy1,a,/*c,*/d,e0,result;

   e0 = en0;
   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];
   y0 = fDifPAIySection[i];
   yy1 = fDifPAIySection[i+1];

   //c = x1/x0;
   d = e0/x0;   
   a = log10(yy1/y0)/log10(x1/x0);

   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);
   
   a += 1;
   if(a == 0)
   {
      result = b*log(x0/e0);
   }
   else
   {
      result = y0*(x0 - e0*pow(d,a-1))/a;
   }
   a++;
   if(a == 0)
   {
      fIntegralPAIySection[0] += b*log(x0/e0);
   }
   else 
   {
      fIntegralPAIySection[0] += y0*(x0*x0 - e0*e0*pow(d,a-2))/a;
   }
   x0 = fSplineEnergy[i - 1];
   x1 = fSplineEnergy[i - 2];
   y0 = fDifPAIySection[i - 1];
   yy1 = fDifPAIySection[i - 2];

   //c = x1/x0;
   d = e0/x0;   
   a = log10(yy1/y0)/log10(x1/x0);
   //  b0 = log10(y0) - a*log10(x0);
   b = y0/pow(x0,a);
   a += 1;
   if(a == 0)
   {
      result += b*log(e0/x0);
   }
   else
   {
      result += y0*(e0*pow(d,a-1) - x0)/a;
   }
   a++;
   if(a == 0) 
   {
      fIntegralPAIySection[0] += b*log(e0/x0);
   }
   else
   {
      fIntegralPAIySection[0] += y0*(e0*e0*pow(d,a-2) - x0*x0)/a;
   }
   return result;

} 

G4double G4PAIySection::SumOverBorderdEdx	(	G4int	intervalNumber,
		G4double	energy
	)

Definition at line 1059 of file G4PAIySection.cc.

{               
  G4double x0,x1,y0,yy1,a,/*c,*/d,e0,result;

   e0 = en0;
   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];
   y0 = fDifPAIySection[i];
   yy1 = fDifPAIySection[i+1];

   //c = x1/x0;
   d = e0/x0;   
   a = log10(yy1/y0)/log10(x1/x0);
   
   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);
   
   a += 2;
   if(a == 0)
   {
      result = b*log(x0/e0);
   }
   else 
   {
      result = y0*(x0*x0 - e0*e0*pow(d,a-2))/a;
   }
   x0 = fSplineEnergy[i - 1];
   x1 = fSplineEnergy[i - 2];
   y0 = fDifPAIySection[i - 1];
   yy1 = fDifPAIySection[i - 2];

   //c = x1/x0;
   d = e0/x0;   
   a = log10(yy1/y0)/log10(x1/x0);

   if(a < 20.) b = y0/pow(x0,a);

   a += 2;
   if(a == 0) 
   {
      result += b*log(e0/x0);
   }
   else
   {
      result += y0*(e0*e0*pow(d,a-2) - x0*x0)/a;
   }
   return result;

} 

G4double G4PAIySection::SumOverBordPlasmon	(	G4int	intervalNumber,
		G4double	energy
	)

Definition at line 1184 of file G4PAIySection.cc.

{               
   G4double x0,x1,y0,yy1,a,c,d,e0,result;

   e0 = en0;
   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];
   y0 = fdNdxPlasmon[i];
   yy1 = fdNdxPlasmon[i+1];

   c = x1/x0;
   d = e0/x0;   
   a = log10(yy1/y0)/log10(c);

   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);
   
   a += 1.0;
   if( a == 0 ) result = b*log(x0/e0);
   else         result = y0*(x0 - e0*pow(d,a-1))/a;   
   a += 1.0;

   if( a == 0 ) fIntegralPlasmon[0] += b*log(x0/e0);
   else         fIntegralPlasmon[0] += y0*(x0*x0 - e0*e0*pow(d,a-2))/a;
   
   x0 = fSplineEnergy[i - 1];
   x1 = fSplineEnergy[i - 2];
   y0 = fdNdxPlasmon[i - 1];
   yy1 = fdNdxPlasmon[i - 2];

   c = x1/x0;
   d = e0/x0;
   a = log10(yy1/y0)/log10(c);
 
   if(a < 20.) b = y0/pow(x0,a);

   a += 1.0;
   if( a == 0 ) result += b*log(e0/x0);
   else         result += y0*(e0*pow(d,a-1) - x0)/a;
   a += 1.0;

   if( a == 0 )   fIntegralPlasmon[0] += b*log(e0/x0);
   else           fIntegralPlasmon[0] += y0*(e0*e0*pow(d,a-2) - x0*x0)/a;
   
   return result;

} 

G4double G4PAIySection::SumOverInterCerenkov

(

G4int

intervalNumber

)

Definition at line 918 of file G4PAIySection.cc.

{         
   G4double x0,x1,y0,yy1,a,c,result;

   x0  = fSplineEnergy[i];
   x1  = fSplineEnergy[i+1];

   if( std::abs( 2.*(x1-x0)/(x1+x0) ) < 1.e-6) return 0.;

   y0  = fdNdxCerenkov[i];
   yy1 = fdNdxCerenkov[i+1];
   // G4cout<<"SumC, i = "<<i<<"; x0 ="<<x0<<"; x1 = "<<x1
   //   <<"; y0 = "<<y0<<"; yy1 = "<<yy1<<G4endl;

   c = x1/x0;
   a = log10(yy1/y0)/log10(c);
   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);

   a += 1.0;
   if(a == 0) result = b*log(c);
   else       result = y0*(x1*pow(c,a-1) - x0)/a;   
   a += 1.0;

   if( a == 0 ) fIntegralCerenkov[0] += b*log(x1/x0);
   else         fIntegralCerenkov[0] += y0*(x1*x1*pow(c,a-2) - x0*x0)/a;
   //  G4cout<<"a = "<<a<<"; b = "<<b<<"; result = "<<result<<G4endl;   
   return result;

} //  end of SumOverInterCerenkov

G4double G4PAIySection::SumOverInterPlasmon

(

G4int

intervalNumber

)

Definition at line 955 of file G4PAIySection.cc.

{         
  G4double x0,x1,y0,yy1,a,c,result;

   x0  = fSplineEnergy[i];
   x1  = fSplineEnergy[i+1];

   if( std::abs( 2.*(x1-x0)/(x1+x0) ) < 1.e-6) return 0.;

   y0  = fdNdxPlasmon[i];
   yy1 = fdNdxPlasmon[i+1];
   c = x1/x0;
   a = log10(yy1/y0)/log10(c);

   G4double b = 0.0;
   if(a < 20.) b = y0/pow(x0,a);

   a += 1.0;
   if(a == 0) result = b*log(x1/x0);
   else       result = y0*(x1*pow(c,a-1) - x0)/a;   
   a += 1.0;

   if( a == 0 ) fIntegralPlasmon[0] += b*log(x1/x0);
   else         fIntegralPlasmon[0] += y0*(x1*x1*pow(c,a-2) - x0*x0)/a;
   
   return result;

} //  end of SumOverInterPlasmon

G4double G4PAIySection::SumOverInterval

(

G4int

intervalNumber

)

Definition at line 842 of file G4PAIySection.cc.

{         
   G4double x0,x1,y0,yy1,a,b,c,result;

   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];

   if( std::abs( 2.*(x1-x0)/(x1+x0) ) < 1.e-6) return 0.;

   y0 = fDifPAIySection[i];
   yy1 = fDifPAIySection[i+1];
   //G4cout << "## x0= " << x0 << " x1= " << x1 << G4endl;
   c = x1/x0;
   //G4cout << "c= " << c << " y0= " << y0 << " yy1= " << yy1 << G4endl;
   a = log10(yy1/y0)/log10(c);
   //G4cout << "a= " << a << G4endl;
   // b = log10(y0) - a*log10(x0);
   b = y0/pow(x0,a);
   a += 1;
   if(a == 0) 
   {
      result = b*log(x1/x0);
   }
   else
   {
      result = y0*(x1*pow(c,a-1) - x0)/a;
   }
   a++;
   if(a == 0) 
   {
      fIntegralPAIySection[0] += b*log(x1/x0);
   }
   else
   {
      fIntegralPAIySection[0] += y0*(x1*x1*pow(c,a-2) - x0*x0)/a;
   }
   return result;

} //  end of SumOverInterval

G4double G4PAIySection::SumOverIntervaldEdx

(

G4int

intervalNumber

)

Definition at line 884 of file G4PAIySection.cc.

{         
   G4double x0,x1,y0,yy1,a,b,c,result;

   x0 = fSplineEnergy[i];
   x1 = fSplineEnergy[i+1];

   if( std::abs( 2.*(x1-x0)/(x1+x0) ) < 1.e-6) return 0.;

   y0 = fDifPAIySection[i];
   yy1 = fDifPAIySection[i+1];
   c = x1/x0;
   a = log10(yy1/y0)/log10(c);
   // b = log10(y0) - a*log10(x0);
   b = y0/pow(x0,a);
   a += 2;
   if(a == 0) 
   {
     result = b*log(x1/x0);
   }
   else
   {
     result = y0*(x1*x1*pow(c,a-2) - x0*x0)/a;
   }
   return result;

} //  end of SumOverInterval

---

The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/processes/electromagnetic/standard/include/G4PAIySection.hh
• geant4.10.03.p01/source/processes/electromagnetic/standard/src/G4PAIySection.cc